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Finding the Fourth Proportional to 7,191.81, 10,784.88 and 2,808.63

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Solution

The fourth proportional to 7,191.81, 10,784.88 and 2,808.63 is: 4,211.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.81 : 10,784.88 = 2,808.63 : x
  2. Step 2: Convert to fraction form
    7,191.81/10,784.88 = 2,808.63/x
  3. Step 3: Cross multiply
    7,191.81x = 10,784.88 × 2,808.63
  4. Step 4: Simplify right side
    7,191.81x = 30,290,737.51
  5. Step 5: Solve for x
    x = 30,290,737.51/7,191.81
  6. Step 6: Final answer
    x = 4,211.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.